PDP-11/45 Board Issues

Hello all, My electronics club recently became the proud owner of a PDP-11/45. Unfortunately, it's not in the best of condition. One of the boards, an M8108 (apparently a memory-managment module) is damaged. Well, actually, it is split in two along the card fingers. After some careful inspection, I have determined that it's probably not possible to repair. Anyone know what will happen if I fire up the machine without this board? We have no peripherals, so we're basically interested in toggling in code and will be satisfied without an OS. If we exclude this card, do we need to toss a NPG card into that spot? Before anyone asks, no, we don't have the printsets. I think this machine is second-second hand, so the previous owner (RPI) didn't have the prints either. Much of what we know of this machine has been determined with a continuity checker... Michael Robinson robinm(a)rpi.edu RPI Electronics Club